COVID-19 vaccine resources — we're here to help.
Doctor's office
Enter your doctor's name to get office information.
Find labs in your network
Enter your primary care doctor's name to find labs in your network.
Find urgent care centers in your network
Enter your primary care doctor's name to find urgent care centers in your network.
Verify your medical group

Refer to your insurance card or call your insurance provider to determine your medical group.

You can also search for your primary care doctor to find the medical group you and your doctor belong to.

Driving Directions
Update Information
Forgot Password

Please enter your e-mail address.

Sharp Health News

Why does my knee hurt?

Jan. 23, 2018

Why does my knee hurt?

From stiffness and instability, to popping or crunching noises, knee pain is a common issue that can affect all people differently, regardless of age. The causes of knee pain can range from injury like a torn ligament, to a medical issue like arthritis.

“Not all knee pain is serious or requires medical attention,” explains Dr. Joel Smith, an orthopedic surgeon affiliated with Sharp HealthCare. “See your doctor when you find yourself unable to put weight on your knee; notice pain or swelling that limits normal activity; or have a fever in addition to knee pain and swelling.”

The most common knee injuries associated with knee pain are ligament injuries, cartilage tears and arthritis of the knee.

Ligament injuries — There are four main ligaments of the knee that help it function properly. A ligament tear directly affects the ability to participate in normal activities like walking and exercising. Not all knee ligament injuries are the same, or require the same treatment.

Cartilage tears — Cartilage is a type of tissue that is strong like a bone, but flexible like a ligament, and is found on either side of the knee joint. Torn cartilage is a common injury — associated with the “popping” noise. Surgery is often required for this kind of tear.

Arthritis — There are many different kinds of arthritis that can be associated with stiffness and swelling of the knee.

While some causes of knee pain — like certain types of arthritis — are genetic, there are risk factors that can increase a person’s overall risk of knee problems. These include being overweight, a lack of strength, playing certain sports such as basketball and soccer, or a previous injury.

“Not all types of knee pain are preventable, but there are ways to reduce the discomfort and disability of living with this issue,” says Dr. Smith. “To prevent knee pain or developing certain knee injuries, I always tell my patients to maintain a healthy weight, exercise regularly at a level that is comfortable for them, and stay flexible through balance and stability training.”

To register for available knee pain seminars, visit

For the news media: To talk with Dr. Joel Smith about knee pain for an upcoming story, contact Erica Carlson, senior public relations specialist, at

You might also like:

Choose the doctor who's right for you.

At Sharp, we make it easy to find an exceptional doctor — right where you live and work.

All Categories
Contact Sharp HealthCare
Call us


For medical or psychiatric emergencies, call 911 immediately.

Email us

Please do not use this form to convey personal or medical information.

How would you like to be contacted?
Date of birth

Find other numbers

View our phone directory

What's This?

These important numbers are located on your billing statement.

Find your Sharp Rees-Stealy account number

Find your SharpCare account number

Find your SharpCare account number
What's GDPR?

The General Data Protection Regulation (GDPR) governs the processing of personal information gathered from individuals while they are in the European Union (EU) and parts of the EEA (European Economic Area, which currently includes Iceland, Lichtenstein and Norway).

We are sorry, but we are unable to process your price estimate if you live or are travelling within the EU or affiliated nations.

What's This?

Many surgery and procedure names sound similar. If possible, please provide the current procedure terminology (CPT) code, which can be found on the order from your doctor.

If you cannot provide the CPT code, please contact your doctor's office for the CPT or a detailed description of services.